128979500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{19843}}^1$

素因数の和:19875

約数の個数: 48

約数和(自身を含む): 303375072

約数和(自身を除く): 174395572

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 650, 1300, 1625, 3250, 6500, 19843, 39686, 79372, 99215, 198430, 257959, 396860, 496075, 515918, 992150, 1031836, 1289795, 1984300, 2480375, 2579590, 4960750, 5159180, 6448975, 9921500, 12897950, 25795900, 32244875, 64489750, 128979500]

約数ペア:

[(1, 128979500), (2, 64489750), (4, 32244875), (5, 25795900), (10, 12897950), (13, 9921500), (20, 6448975), (25, 5159180), (26, 4960750), (50, 2579590), (52, 2480375), (65, 1984300), (100, 1289795), (125, 1031836), (130, 992150), (250, 515918), (260, 496075), (325, 396860), (500, 257959), (650, 198430), (1300, 99215), (1625, 79372), (3250, 39686), (6500, 19843)]